$ curl http://cozy.io/install_cozy.sh | HOST=root@ip sh # sudoer required
Edit: even more annoying is that this script is only supposed to run on Debian/Ubuntu - so this script isn't even any more portable than .deb packages
Edit2 to be more constructive: would you accept contributions to build packages? Apart from this annoyance the project looks interesting!
Of course any contribution of this kind is greatly appreciated !
About the channel, the (real) install script is based on Fabric and use SSH. So you can refer directly to this: http://cozy.io/host/install.html
Not that what you are suggesting is good in the first place.
1. they can be signed
2. they can be analyzed (also at a later date if you keep them around) to figure out if any "mis-feature" was added after the fact or came from upstream. Those scripts typically download all kinds of other things during the installation.